Some fish live beyond 100 and get healthier as they age

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&gt; Buffalofish can go decades between successful reproductions because they require very specific environmental conditions—most of which are still unknown—to procreate. That’s why the fish evolved to live so long: It’s an evolutionary adaptation to account for long periods without breeding, according to Lackmann.<p>This reminds me of &quot;The Fable of the Dragon-Tyrant&quot; by Nick Bostrom [1]. Senescence is engraved in our brains as universal. Just like our expectation about health which should deteriorate overtime.<p>[1] <a href="https:&#x2F;&#x2F;nickbostrom.com&#x2F;fable&#x2F;dragon" rel="nofollow">https:&#x2F;&#x2F;nickbostrom.com&#x2F;fable&#x2F;dragon</a>

&gt; In one study, bigmouth buffalo had stronger immune systems than younger fish.<p>Or maybe only fishes with a stronger immune system get older ?

&gt; These calcium carbonate structures, which allow fish to hear and sense vibrations in the water, form a new layer each year that can be read somewhat like tree rings.<p>Each time I read dating method like these, I wonder how stable these method are. Sure they are sensitive to water temperature, right? We have not-so-long-term climate changes, periodic solar storms and irregular volcano eruption.. All these are affect water temperture...

It&#x27;s not clear from the article but animals can generally live quite a bit longer than you&#x27;d expect if they continue to grow for their entire life, which is true for some types of fish. Gunk that builds up inside or between cells gets redistributed over larger areas, as do cells that become senescent. And larger size means more space for memory T cells. Those are only some aspects of aging of course.

&quot;The otolith analysis revealed that about 90 percent of Apache Lake’s buffalofishes were more than 85 years old&quot;. That sounds very fishy. Perhaps they just have some sort of genetic code that make them create those new layers of calcium carbonate structures more often than once a year.

If you&#x27;re curious to learn more, look into cold blooded vs warm blooded animals and longevity. Cold blooded animals might give us hints to slow aging in humans.<p>Energy expenditure might be related to longevity. Eating more and exercising more (and the energy required to keep your core temperature up) might kill you faster, maybe through free radical production from metabolism.

That one time a goldfish lived for more than 200 years:<p><a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Hanako_(fish)" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Hanako_(fish)</a>

That is beyond amazing to me.<p>As a layperson in biology related stuff, I&#x27;d like to ask: How do scientists estimate the age of non-human animals?

tl;dr:<p>The older ones are better able to fight bacteria, and have a &quot;lower ratio of neutrophils to lymphocytes in the blood&quot;, which ratio indicates stress. They evolved to live a long time because good breeding conditions are rare. No word on biochemical mechanisms.

Imagine you are a fish. Youbdodge predators for 90 years. You survive the dirty water with all the chemicals put there by humans. Then some asshole angler kills you.<p>If someone wants to eat fish capture them from human made pond used to raise fish.

That&#x27;s because they drink a lot of water, and everybody knows water is good for you. :)))

How does this track with bioaccumulation of plastics and mercury and other pollutants over such a long life?

It&#x27;s all the cardio. Fish do cardio 24-7 their whole life. Therefore older=better.

Aren’t lobsters immortal if they never have an accident?

Paywall

It must be their vaccination schedule